diff --git a/Help/manual/cmake-variables.7.rst b/Help/manual/cmake-variables.7.rst
index af2c3481f..c342dbee1 100644
--- a/Help/manual/cmake-variables.7.rst
+++ b/Help/manual/cmake-variables.7.rst
@@ -181,6 +181,7 @@ Variables that Describe the System
    /variable/CMAKE_SYSTEM_VERSION
    /variable/CYGWIN
    /variable/ENV
+   /variable/MINGW
    /variable/MSVC10
    /variable/MSVC11
    /variable/MSVC12
diff --git a/Help/variable/MINGW.rst b/Help/variable/MINGW.rst
new file mode 100644
index 000000000..521d41727
--- /dev/null
+++ b/Help/variable/MINGW.rst
@@ -0,0 +1,6 @@
+MINGW
+-----
+
+True when using MinGW
+
+Set to true when the compiler is some version of MinGW.